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Effects of dietary vitamin C on growth, gonad development and antioxidant ability of on‐growing gibel carp ( Carassius auratus gibelio var. CAS III )
Author(s) -
Shao Liye,
Han Dong,
Yang Yunxia,
Jin Junyan,
Liu Haokun,
Zhu Xiaoming,
Xie Shouqi
Publication year - 2018
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13578
Subject(s) - ascorbic acid , biology , carp , antioxidant , gonadosomatic index , vitamin c , endocrinology , medicine , vitamin , development of the gonads , zoology , superoxide dismutase , vitamin e , gonad , food science , biochemistry , fecundity , fish <actinopterygii> , fishery , population , demography , sociology
An 88‐day experiment was conducted in a flowing system to evaluate the effects of dietary vitamin C on growth, body composition, antioxidant and gonad development of on‐growing gibel carp. Triplicate tanks of gibel carp (77.2 ± 0.1 g) were randomly fed with one of seven experimental diets containing l ‐ascorbic acid of 0, 101.1, 188.5, 313.1, 444.1, 582.1 and 747.0 mg/kg, respectively. The results showed that specific growth rate ( SGR ) and feed efficiency ( FE ) of fish were not affected by dietary l ‐ascorbic acid. Dietary l ‐ascorbic acid of 444.1 mg/kg diet led to low levels ( p < .05) of gonadosomatic index ( GSI ) and hypothalamic gonadotropin‐releasing hormone (Gn RH ) in on‐growing fish, as well as the early ovarian stages (Developing stages) compared with fish (Maturing stages) from the other groups. Dietary l ‐ascorbic acid supplementation increased ( p < .05) the dorsal muscle collagen content, but did not affect the protein or lipid content of dorsal muscle in gibel carp. Plasma total antioxidant capacity (T‐ AOC ) and superoxide dismutase ( SOD ) activity increased ( p < .05) and then remained unchanged with the increase in dietary l ‐ascorbic acid levels. Dietary l ‐ascorbic acid of 101.1 mg/kg diet improved ( p < .05) plasma lysozyme activity of the fish. Broken‐line regression indicated that dietary l ‐ascorbic acid requirement of 77 g gibel carp was 223.3 or 225.0 mg/kg diet based on plasma T‐ AOC or SOD activity, which was a little higher than that based on plasma l ‐ascorbic acid concentration (193.2 mg/kg).